CN105121887B

CN105121887B - Clutch mechanism and speed changer

Info

Publication number: CN105121887B
Application number: CN201480022042.3A
Authority: CN
Inventors: 盐津勇
Original assignee: Toyota Central R&D Labs Inc
Current assignee: Toyota Central R&D Labs Inc
Priority date: 2013-04-15
Filing date: 2014-04-14
Publication date: 2017-09-26
Anticipated expiration: 2034-04-14
Also published as: US9810271B2; JP5790701B2; JP2014206250A; CN105121887A; US20160040726A1; WO2014171424A1

Abstract

Under conditions of rotating speed of the rotating speed higher than the second rotary shaft (22) of the first rotary shaft (12), respectively performed for engaging the operation of clutch mechanism through right-handed helix groove (32) by the part (15) that is supported by sleeve (14), and under conditions of rotating speed of the rotating speed less than the second rotary shaft (22) of the first rotary shaft (12), the operation for engaging clutch mechanism passes through the part (15) being supported and respectively passes through left hand helix groove (33) to perform.In the operation for disconnecting clutch mechanism, right-handed helix groove (32) releasing clutch mechanism under conditions of rotating speed of the rotating speed less than the second rotary shaft (22) of the first rotary shaft (12) is respectively passed through by the part (15) being supported, and left hand helix groove (33) releasing clutch mechanism under conditions of rotating speed of the rotating speed higher than the second rotary shaft (22) of the first rotary shaft (12) is respectively passed through by the part (15) being supported.

Description

Clutch mechanism and speed changer

Technical field

The present invention relates to a kind of clutch mechanism of connection/disconnection power and a kind of speed change including the clutch mechanism Device.

Background technology

Patent Document 1 discloses the correlation technique of the clutch mechanism of connection/disconnection power.In patent document 1 Clutch mechanism is a kind of synchronous from displacement clutch (SSS clutches), wherein switch sleeve is rotated with the rotating speed of steamturbine, Until switch sleeve reaches synchronous rotational speed, and if switch sleeve reaches synchronous rotational speed, then switch sleeve and generated electricity securely The pawl grasping of the switch sections of arbor.If switching sleeve exceedes synchronous rotational speed, sleeve will be switched along steam using screw rod Axially move in the direction of turbine.After short times, the tooth of switch sleeve and the tooth of generator shaft are bonded with each other, and And transmit power via tooth.If on the contrary, the rotating speed of steamturbine gets lower than synchronous rotational speed, sleeve will be switched using screw rod Moved along the direction relative with steamturbine with moving for axial direction, and switch the tooth of sleeve and the tooth of generator shaft It is mutually disengaged and is cut off so as to the transmission of power.

Citation list

Patent document

Patent document 1：JP 2010-506113 A

The content of the invention

Technical problem

In the SSS clutches of patent document 1, when being driven from driving side (steamturbine), switch sleeve tooth and The tooth of generator shaft is bonded with each other, and need not maintain this from any power of the power source in addition to steamturbine Engagement state.However, the transition from release conditions to engagement state has been restricted to the rotating speed of wherein driving side (steamturbine) The condition of rotating speed through increasing and reaching slave end (generator shaft), and SSS clutches from engagement state to release shape The rotating speed that the transition of state is restricted to wherein driving side is decreased and get lower than the condition of the rotating speed of slave end.Therefore, Under conditions of rotating speed of the rotating speed less than slave end (generator shaft) of driving side (steamturbine), it is impossible to perform SSS clutches Bonding operation (tooth for being used for moving switch sleeve is allowed to operation with the indented joint of generator shaft).Moreover, can not hold Exercise driving side rotating speed higher than slave end rotating speed SSS clutches release operation (be used for moving switch sleeve tooth It is allowed to depart from the operation with the engagement of the tooth of generator shaft).

An advantage of the invention that providing a kind of clutch mechanism, it can rotate with the first rotary part and second The condition of the rotating speed of part independently connection/disconnection power between the first rotary part and the second rotary part, and it is not It is required that the power of the engagement state to maintain the first rotary part and the second rotary part.A further advantage is that A kind of speed changer is provided, it is upshiftd and downshifted to perform using the clutch mechanism.

Solution to problem

Take following measures to realize above-mentioned purpose at least in part according to the clutch mechanism and speed changer of the present invention.

First rotary part is included according to a kind of clutch mechanism of the present invention, the movable member of bonding part is provided with, With the second rotary part, it is provided with the engaged part for being configured to engage with the bonding part of movable member.First rotating part Part is provided with the support section of support movable member.Movable member can be moved along support section relative to the first rotary part It is dynamic.Support section is included in the position that the bonding part of movable member is not closed with the joint tap of the second rotary part here The non-engaging portion for putting place's support movable member, the left hand helix positioned than non-engaging portion closer to the second rotary part side Part is branched off into the component of left-hand screw portion and right-handed helix part with right-handed helix part, from non-engaging portion, and Positioned than component closer to the second rotary part side and wherein left-hand screw portion and right-handed helix part are combined Bound fraction.When the Support Position of movable member supported portion sub-support here has been moved to branch from non-engaging portion Timesharing, starts the engagement the bonding part of movable member and the joint of the second rotary part point between.The clutch machine Structure further comprises limiting mechanism, the limit when the Support Position of movable member supported portion sub-support here is bound fraction Movement of the mechanism limitation movable member processed relative to the first rotary part.

In one aspect of the invention, the clutch mechanism is preferably to further comprise applying along remote to movable member From the load generation mechanism of the load in the direction of the second rotary part.

In one aspect of the invention, preferably movable member is provided with the supported portion for being supported part support Point, and the abutment surface that supported portion point is abutted thereon when the load that load generation mechanism is produced is applied to movable member Formed at least one in left-hand screw portion and right-handed helix part.

Included according to a kind of speed changer of the present invention：First rotary part；Be provided with the first bonding part first is movable Part；First gear part, it includes first gear and is provided with the first bonding part being configured to the first movable member The engaged part of the first of engagement；It is provided with the second movable member of the second bonding part；Second gear part, it includes second Gear and being provided with is configured to the second engaged part engaged with the second bonding part of the second movable member；With the second rotation Rotation member, itself and with first gear engage the 3rd gear and with second gear engage the 4th gear together with rotate. Gear ratio between one gear and the 3rd gear is different from the gear ratio between second gear and the 4th gear.First rotating part Part is provided with the first support section of the first movable member of support, and supports the second support section of the second movable member.First Movable member can be moved along the first support section relative to the first rotary part.Second movable member can be along second Support part split-phase is moved for the first rotary part.First support section includes：First non-engaging portion, it is in the first movable member The position do not closed here with the first joint of first gear part tap of the first bonding part at support first it is movable Part, the first right-handed helix part positioned than the first non-engaging portion closer to first gear component side and the first left hand spiral shell Rotation partly, from the first non-engaging portion is branched off into the first branch of the first right-handed helix part and the first left-hand screw portion Point, and the first bound fraction, it is positioned and wherein first right hand than the first component closer to first gear component side Spiral part and the first left-hand screw portion are combined.When the first movable member is supported by the first support section support here When position is moved to the first component from the first non-engaging portion, start in the first bonding part of the first movable member And the engagement between the first joint of first gear part point.Second support section includes：Second non-engaging portion, its At the position that second bonding part of the second movable member is not closed with the second joint tap of second gear part here Support the second movable member, the second right-handed helix part positioned than the second non-engaging portion closer to second gear component side The second right-handed helix part and the second left-hand screw portion are branched off into the second left-hand screw portion, from the second non-engaging portion Second component, and the second bound fraction, it is positioned and it than the second component closer to second gear component side In the second right-handed helix part and the second left-hand screw portion combine.When the second movable member is here by the second support section When the Support Position of support is moved to the second component from the second non-engaging portion, start the in the second movable member Engagement between two bonding parts and the second joint of second gear part point.The clutch mechanism further comprises：The One limiting mechanism, when the Support Position that the first movable member is supported by the first support section here is the first bound fraction First limiting mechanism limits movement of first movable member relative to the first rotary part, and the second limiting mechanism, when second can The second limiting mechanism is limited the when dynamic component is here the second bound fraction by the Support Position that the second support section is supported Movement of two movable members relative to the first rotary part.

In one aspect of the invention, the clutch mechanism is preferably to further comprise applying edge to the first movable member The first load generation mechanism of the load in the direction away from first gear part, and is applied to the second movable member along remote Second load generation mechanism of the load in the direction of second gear part.

In one aspect of the invention, preferably the first movable member is provided with the supported by the first support section One supported portion point, and the second movable member is provided with the second supported portion point supported by the second support section.It is preferred that Be that the first supported portion point is abutted thereon when the load that the first load generation mechanism is produced is applied to the first movable member At least one in the first right-handed helix part and the first left-hand screw portion of the first abutment surface formation in, and when the The second supported portion point is abutted thereon when the load that two load generation mechanisms are produced is applied to the second movable member second is supported Connect at least one that surface is formed in the second right-handed helix part and the second left-hand screw portion.

The advantageous effects of the present invention

In the clutch mechanism according to the present invention, power can be with the first rotary part and the rotating speed of the second rotary part Condition independently connection/disconnection between the first rotary part and the second rotary part, and enable to be used to maintain the The power of the engagement state of one rotary part and the second rotary part is unnecessary.In the speed changer according to the present invention, this Clutch mechanism is planted to can be used in performing upshift and downshift.

Brief description of the drawings

Fig. 1 is the chart for showing the general structure of clutch mechanism according to an embodiment of the invention；

Fig. 2 is the chart for showing the general structure of clutch mechanism according to an embodiment of the invention；

Fig. 3 is the chart for showing the general structure of clutch mechanism according to an embodiment of the invention；

Fig. 4 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Fig. 5 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Fig. 6 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Fig. 7 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Fig. 8 is the chart for the construction example for showing limiting mechanism；

Fig. 9 is the chart for the operation for illustrating limiting mechanism；

Figure 10 is the chart for the operation for illustrating limiting mechanism；

Figure 11 is the chart for the operation for illustrating limiting mechanism；

Figure 12 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Figure 13 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Figure 14 is the chart for the operation for illustrating limiting mechanism；

Figure 15 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Figure 16 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Figure 17 is the chart for illustrating the operation of clutch mechanism according to an embodiment of the invention；

Figure 18 is the chart for showing the general structure of speed changer according to an embodiment of the invention；

Figure 19 is the chart for showing the general structure of speed changer according to an embodiment of the invention；

Figure 20 is the chart for showing the general structure of speed changer according to an embodiment of the invention；

Figure 21 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 22 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 23 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 24 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 25 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 26 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 27 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 28 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 29 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 30 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 31 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；

Figure 32 is the chart for illustrating the operation of speed changer according to an embodiment of the invention；And

Figure 33 is the chart for illustrating the operation of speed changer according to an embodiment of the invention.

Embodiment

Hereinafter, the pattern (hereinafter referred to as embodiment) for implementing the present invention will be described with reference to the drawings.

Fig. 1 to 3 is the chart for the general structure for showing clutch mechanism according to an embodiment of the invention.Fig. 1 shows Go out the perspective view of essential structure, Fig. 2 shows what is pitched from the axial direction with the first and second rotary shafts 12 and 22 with right angle intersection The section view for the essential structure that direction is seen.Fig. 3 shows the outer surface circumferentially direction exhibition of wherein the first rotary shaft 12 The expansion plane opened.Due to the power from driving source such as engine or motor transmission, the first of the first rotary part is used as Rotary shaft 12 rotates along predetermined direction.Formed for supporting as the brace groove 30 of the sleeve 14 of movable member in the first rotation In the periphery of rotating shaft 12.In the inner circumferential of sleeve 14, multiple (in example shown in Fig. 1 and 3 three) supported portion point 15 are set Have circumferentially direction in the space reserved each other (such as with 120 ° of equal intervals).When each supported portion point 15 When being assembled in the brace groove 30 of the first rotary shaft 12, sleeve 14 is supported by the first rotary shaft 12.Each of sleeve 14 Supported portion point 15 can be moved along the bearing of trend of brace groove 30, so that sleeve 14 can be relative along brace groove 30 Moved in the first rotary shaft 12.Moreover, on the periphery of sleeve 14, multiple soldered tooths 16 be provided with circumferentially direction mutual Between the space that reserves (at equal intervals).In Fig. 1, the first rotary shaft 12 and sleeve 14 are dividually shown.

Coaxially put as the second rotary shaft 22 and the first rotary shaft 12 of the second rotary part, and via bearing 23 Rotatably supported by the first rotary shaft 12.Axial direction of second rotary shaft 22 along the first and second rotary shafts 12 and 22 Put than sleeve 14 closer to side (left side in Fig. 2) in direction (hereinafter referred to simply as axial direction).Second Rotary shaft 22 is on the end face on opposite side (right side in Fig. 2) axially, and multiple engaged teeth 26 are provided with edge Circumferential direction in the space reserved each other (with the interval equal with those intervals of soldered tooth 16).The engagement of sleeve 14 Tooth 16 be arranged to axially face the second rotary shaft 22 engaged tooth 26, and can be with the second rotary shaft 22 quilt Soldered tooth 26 is engaged (engagement).

As shown in expanded view in figure 3, the brace groove 30 of the first rotary shaft 12 is with axially extending Disengaged groove 31, the right side that is axially positioned than disengaged groove 31 closer to side (side of the second rotary shaft 22) Hand helical groove 32 and left hand helix groove 33, from disengaged groove 31 it is branched off into right-handed helix groove 32 and left hand helix groove 33 groove component 34, and groove bound fraction 35, it is axially than groove component 34 closer to one Side (side of the second rotary shaft 22) is positioned and wherein right-handed helix groove 32 and left hand helix groove 33 is combined.Real shown in Fig. 3 In example, three disengaged grooves 31, three right-handed helix grooves 32, three left hand helix grooves 33, three groove components 34, and three groove bound fractions 35 are respectively formed.This three disengaged grooves 31 be disposed with circumferentially direction in phase The space reserved between mutually (with the interval at those intervals equal to the supported portion of sleeve 14 point 15).Three groove branches Points 34 be also disposed with circumferentially direction each other (with those intervals equal to supported portion point 15 and disengaged groove 31 Interval) space that reserves.Three groove bound fractions 35 be also disposed with circumferentially direction each other (with equal to quilt Support section 15, disengaged groove 31, and those intervals of groove component 34 interval) space that reserves.Each is right Hand helical groove 32 is from groove bound fraction 35 towards groove component 34 (axially from side to opposite side) Formed right-handed helix.Each left hand helix groove 33 is from groove bound fraction 35 towards the (edge of groove component 34 Axial direction from side to opposite side) formed left hand helix.Three right-handed helix grooves 32 have equal torsion Angle, and three left hand helix grooves 33 have equal windup-degree.Right-handed helix groove 32 and left hand helix groove 33 can have the windup-degree of same degree or can have different degrees of windup-degree.Right-handed helix groove 32 and a left side Hand helical groove 33 can be with from groove bound fraction 35 to the constant windup-degree of groove component 34 or continuously The windup-degree of change or the windup-degree intermittently changed.On disengaged groove 31, right-handed helix groove 32, left hand spiral shell Groove 33, groove component 34, and groove bound fraction 35 are revolved, the number of each of which can be many in addition to three It is individual, or can be one.

As shown in FIG. 3, when the supported portion points 15 of sleeve 14 is assemblied in disengaged groove 31, i.e. when by When the position of sleeve 14 that brace groove 30 is supported is disengaged groove 31, the soldered tooth 16 of sleeve 14 not with the second rotary shaft 22 Engaged tooth 26 engage and (be not engaged with).In this case, the supported portion of sleeve 14 points 15 can be along disengaged recessed The bearing of trend (axial direction) of groove 31 is mobile, so that sleeve 14 can be moved axially relative to the first rotary shaft 12 It is dynamic.

As shown in FIG. 4, when the supported portion point 15 of sleeve 14 is axially moved from disengaged groove 31 When moving to side and being assemblied in groove component 34, i.e. when be supported groove 30 support sleeve 14 position During through being moved to groove component 34 from disengaged groove 31, the soldered tooth 16 of sleeve 14 starts the quilt with the second rotary shaft 22 Soldered tooth 26 engages and (starts to engage).

As shown in Fig. 5 or Fig. 6, when the supported portion point 15 of sleeve 14 is assemblied in right-handed helix groove 32 or a left side When in hand helical groove 33, i.e. when the position for the sleeve 14 for being supported the support of groove 30 is right-handed helix groove 32 or a left side During hand helical groove 33, the soldered tooth 16 of sleeve 14 is partly engaged with the engaged tooth 26 of the second rotary shaft 22 (partly to be connect Close).In this case, the supported portion of sleeve 14 points 15 can be along right-handed helix groove 32 or left hand helix groove 33 Bearing of trend is moved, and is relatively rotated simultaneously so that sleeve 14 can be moved axially relative to the first rotary shaft 12. As the supported portion point 15 of sleeve 14 becomes closer to groove bound fraction 35 (becoming far from groove component 34), set The degree increase that the soldered tooth 16 of cylinder 14 is engaged with the engaged tooth 26 of the second rotary shaft 22.

As shown in FIG. 7, when the supported portion points 15 of sleeve 14 is assemblied in groove bound fraction 35, i.e. when by When the position of the sleeve 14 supported to brace groove 30 is groove bound fraction 35, the rotary shaft of soldered tooth 16 and second of sleeve 14 22 engaged tooth 26 is at a fully engaged (engagement).

The second rotary shaft 22 is attached to as the spring 38 of load generation mechanism.Spring 38 is axially elasticity , and apply the load along the direction away from the second rotary shaft 22 (towards opposite side axially to sleeve 14 Load).When the supported portion points 15 of sleeve 14 is assemblied in groove bound fraction 35 (when being supported the support of groove 30 When the position of sleeve 14 is groove bound fraction 35), shifting of the limitation of limiting mechanism 40 supported portion point 15 along brace groove 30 It is dynamic, it thus limit movement of the sleeve 14 relative to the first rotary shaft 12.The construction example of limiting mechanism 40 figure 8 illustrates. Shown in Fig. 8 construct example in, circumferentially the adjacent limiting part 42 and 43 in direction respectively via spring 44 and 45 by The peripheral support of first rotary shaft 12, and it is respectively axially square by direction due to the elastic acting force of spring 44 and 45 To opposite side drive.Cutout unit formation is in limiting part 42 and 43 so as to the supported portion point 15 for keeping sleeve 14 Holding part 41 is formed.Moreover, relative to the inclined tapered surface 46 and 47 of axial direction respectively in limiting part 42 With 43 in formed.

As shown in FIG. 8, when due to the elastic acting force of spring 44 and 45, limiting part 42 and 43 is by towards along axle When being driven to the opposite side in direction, holding part 41 is positioned in groove bound fraction 35, the tapered surface 46 of limiting part 42 Tapered surface 47 in face of right-handed helix groove 32, and limiting part 43 faces left hand helix groove 33.If being assemblied in the right side The supported portion of sleeve 14 in hand helical groove 32 point 15 is moved towards groove bound fraction 35, then as shown in FIG. 9, quilt Support section 15 extrudes the tapered surface 46 of limiting part 42, so that in compression spring 44, limiting part 42 is moved into The side of axial direction, and supported portion point 15 is moved to groove bound fraction 35.If supported portion point 15 is moved to recessed Groove bound fraction 35, the then spring 44 compressed is resumed, so that limiting part 42 is driven to be moved into axial direction Opposite side.If the supported portion for the sleeve 14 being assemblied in left hand helix groove 33 point 15 is moved towards groove bound fraction 35 It is dynamic, then as shown in Figure 10, the tapered surface 47 of the extruding limiting part 43 of supported portion point 15, so that in compression spring 45 When, limiting part 43 is moved into the side of axial direction, and supported portion point 15 is moved to groove bound fraction 35.Such as Fruit supported portion point 15 is moved to groove bound fraction 35, then the spring 45 compressed is resumed, so that limiting part 43 is driven Plan is to be moved into the opposite side of axial direction.Therefore, as shown in Figure 11, the supported portion of sleeve 14 point 15 passes through limit The holding part 41 of part 42 and 43 processed is kept, and movement of the sleeve 14 relative to the first rotary shaft 12 is restricted.Work as set The supported portion points 15 of cylinder 14 from right-handed helix groove 32 or left hand helix groove 33 towards groove bound fraction 35 move when, In compression spring 38, sleeve 14 is moved into the side of axial direction.

It is real so as to the supported portion point 15 of sleeve 14 that sleeve 14 is moved into the side of axial direction by drive mechanism 52 Now from being assemblied in disengaged groove 31 to the transition being assemblied in groove component 34.That is, groove 30 is supported to support The position of sleeve 14 be moved to groove component 34 from disengaged groove 31.In example is constructed shown in Fig. 1 and 2, displacement Part 52 is arranged on as drive mechanism in the inner circumferential of the first rotary shaft 12, and shifting part 52 being capable of axially phase Moved for the first rotary shaft 12.Moreover, the first rotary shaft 12 is provided with linkage 54, and linkage 54 can be surrounded Axis perpendicular to axial direction rotates relative to the first rotary shaft 12.As shown in Figure 12, if shifting part 52 is moved To opposite side (right side in Figure 12) axially, then linkage 54 rotate counterclockwise in fig. 12 with towards along The side extruding sleeve 14 of axial direction, so that in compression spring 38, sleeve 14 is moved into the side of axial direction, and And as shown in figs. 3 and 4, the supported portion point 15 of sleeve 14 is moved to groove component 34 from disengaged groove 31. Therefore, the position for being supported the sleeve 14 of the support of groove 30 is moved to groove component 34 from disengaged groove 31.

Shifting part 52 discharges the limitation of movement of the limiting mechanism 40 to sleeve 14 relative to the first rotary shaft 12.In Fig. 1 Constructed with 2 Suo Shi in example, if shifting part 52 is moved into the side of axial direction (in Figure 13 as shown in Figure 13 Left side), then shifting part 52 to axially side extrude limiting mechanism 40 (limiting part 42 and 43) so that such as Shown in fig. 14, at compression spring 44 and 45, limiting part 42 and 43 is moved into the side of axial direction.As a result, The condition that the holding part 41 of 15 restricting portion parts 42 and 43 of the supported portion of its middle sleeve 14 point is kept is released, and right Limitation of the sleeve 14 relative to the movement of the first rotary shaft 12 is released.In addition it is possible to by driving under electronic control Actuator drives drive mechanism 52 by the operation of operator (shifting part 52 can also be moved axially).

Then, the operation of the clutch mechanism according to the present embodiment is described, especially, in the He of the first rotary shaft 12 The operation of connection/disconnection power between second rotary shaft 22.In situation described below, from driving source such as engine or The power of person's motor is transfused to the first rotary shaft 12.

As shown in FIG. 3, when the position for the sleeve 14 for being supported the support of groove 30 is the disengaged (sleeve 14 of groove 31 Supported portion points 15 be assemblied in disengaged groove 31) when, the soldered tooth 16 of sleeve 14 is not connect with the second rotary shaft 22 Tooth 26 is closed to engage.In this case, clutch mechanism is in release conditions, and in the first rotary shaft 12 and the second rotary shaft The transmission of power between 22 is cut off.If the first rotary shaft 12 using the power from driving source along predetermined direction (when Clockwise direction when seeing the first rotary shaft 12 from side (left side in Fig. 2) axially in example in fig. 2) Rotation, then sleeve 14 is also rotated with identical rotating speed together with the first rotary shaft 12.

In order to which clutch mechanism is changed to engagement state with the first rotary shaft 12 and the second rotary shaft from release conditions Power is transmitted between 22, as shown in Figure 12, using linkage 54, shifting part 52 is firstly moved to axially Opposite side with to axially side extrude sleeve 14.In compression spring 38, sleeve 14 is moved into axial direction The side in direction, and if the supported portion point 15 of sleeve 14 is moved to as shown in figs. 3 and 4 from disengaged groove 31 Groove component 34, then as shown in Figure 12, the soldered tooth 16 of sleeve 14 start the engaged tooth with the second rotary shaft 22 26 engage, and the rotary shaft 22 of sleeve 14 and second rotates and synchronized.

The edge of first rotary shaft 12 when the supported portion points 15 of sleeve 14 is moved into groove component 34 wherein The rotating speed of predetermined direction higher than in the situation of the second rotary shaft 22, as shown in figures 4 and 5, the supported portion of sleeve 14 15 are divided to be moved to right-handed helix groove 32 and then along the bearing of trend of right-handed helix groove 32 from groove component 34 Groove bound fraction 35 is moved to, so that along the direction phase reverse with predetermined direction (direction of rotation of the first rotary shaft 12) When being rotated for the first rotary shaft 12, sleeve 14 is relatively moved into the side of axial direction.Therefore, allowing first Rotational differential between rotary shaft 12 and sleeve 14 is so that rotating speed of first rotary shaft 12 along predetermined direction can be higher than sleeve During the rotating speed of 14 (the second rotary shafts 22), sleeve 14 can be moved into the side of axial direction.If sleeve 14 is moved to Side axially, the then part that the soldered tooth 16 of its middle sleeve 14 is engaged with the engaged tooth 26 of the second rotary shaft 22 Ratio increase.

When the supported portion point 15 of sleeve 14 is moved towards groove bound fraction 35 in right-handed helix groove 32, squeezing During pressing spring 38, sleeve 14 is moved into the side of axial direction, and towards the load of opposite side axially Sleeve 14 is applied to from spring 38.Due to the load of spring 38, as shown in Figure 15, the supported portion point 15 of sleeve 14 is abutted In right-handed helix groove 32 on side surface (abutment surface) 32a on opposite side axially, so that extruding force is (anti- Active force) FR1 is applied to supported portion points 15, and this extruding force (reaction from the side surface 32a of right-handed helix groove 32 Power) FR1 is applied to the second rotary shaft 22 via spring 38.Because the side surface 32a of right-handed helix groove 32 from its front side to Its rear side is tilted relative to the direction of rotation (predetermined direction) of the first rotary shaft 12 towards side axially, so Have from the side surface 32a of the right-handed helix groove 32 extruding force FR1 for being applied to supported portion point 15 along the first rotary shaft 12 Direction of rotation (predetermined direction) component F a1.Therefore, by from be attached to the second rotary shaft 22 spring 38 will towards along The load of the opposite side of axial direction is applied to sleeve 14, and sleeve 14 is applied to along the moment of torsion of predetermined direction.Along predetermined party To this moment of torsion can be used in the part of the power by the first rotary shaft 12 is input to from driving source and be delivered to the second rotation Axle 22.

If the supported portion of the sleeve 14 moved in right-handed helix groove 32 point 15 reaches groove bound fraction 35 Near, then as shown in FIG. 9, the tapered surface 46 of the extruding limiting part 42 of supported portion point 15, so that in compression spring 44 When, limiting part 42 is moved into the side of axial direction, and supported portion point 15 is moved to groove bound fraction 35.Such as Fruit supported portion point 15 is moved to groove bound fraction 35, then the spring 44 compressed recovers, so that limiting part 42 is driven To be moved into the opposite side of axial direction.Therefore, as shown in Figure 11,15 restricting portions of the supported portion of sleeve 14 point The holding part 41 of part 42 and 43 is kept, and movement of the sleeve 14 relative to the first rotary shaft 12 is restricted.

On the contrary, first rotary shaft when the supported portion points 15 of sleeve 14 is moved into groove component 34 wherein 12 are less than in the situation of the rotating speed of the second rotary shaft 22 along the rotating speed of predetermined direction, as shown in Fig. 4 to Fig. 6, sleeve 14 Supported portion points 15 be moved to left hand helix groove 33 and then along left hand helix groove 33 from groove component 34 Bearing of trend be moved to groove bound fraction 35 so that along with predetermined direction (direction of rotation of the first rotary shaft 12) phase When same direction rotates relative to the first rotary shaft 12, sleeve 14 is relatively moved into the side of axial direction.Therefore, exist Allow the rotational differential between the first rotary shaft 12 and sleeve 14 so as to which the first rotary shaft 12 can along the rotating speed of predetermined direction During with less than the rotating speed of sleeve 14 (the second rotary shaft 22), sleeve 14 can be moved into the side of axial direction.

When the supported portion point 15 of sleeve 14 is same to be moved towards groove bound fraction 35 in left hand helix groove 33, In extrusion spring 38, sleeve 14 is moved into the side of axial direction, and towards opposite side axially Load is applied to sleeve 14 from spring 38.Due to the load of spring 38, as shown in Figure 16, the supported portion point 15 of sleeve 14 Left hand helix groove 33 is connected on side surface (abutment surface) 33a on opposite side axially, so as to extrude Power (reaction force) FL1 is applied to supported portion point 15, and this extruding force from the side surface 33a of left hand helix groove 33 (reaction force) FL1 is applied to the second rotary shaft 22 via spring 38.Because the side surface 33a of left hand helix groove 33 from it Front side is to direction of rotation (predetermined direction) of its rear side relative to the first rotary shaft 12 towards opposite side axially Tilt, so having from the side surface 33a of the left hand helix groove 33 extruding force FL1 for being applied to supported portion points 15 along with the The component F b1 in the reverse direction in the direction of rotation (predetermined direction) of one rotary shaft 12, and along the side reverse with predetermined direction To moment of torsion be applied to sleeve 14.

If the supported portion of the sleeve 14 moved in left hand helix groove 33 point 15 reaches groove bound fraction 35 Near, then as shown in Figure 10, the tapered surface 47 of the extruding limiting part 43 of supported portion point 15, so that in compression spring 45 When, limiting part 43 is moved into the side of axial direction, and supported portion point 15 is moved to groove bound fraction 35.Such as Fruit supported portion point 15 is moved to groove bound fraction 35, then the spring 45 compressed recovers, so that limiting part 43 is driven To be moved into the opposite side of axial direction.Therefore, as shown in Figure 11,15 restricting portions of the supported portion of sleeve 14 point The holding part 41 of part 42 and 43 is kept, and movement of the sleeve 14 relative to the first rotary shaft 12 is restricted.

As shown in Fig. 7 and 11, when the restricting portion parts 42 and 43 of supported portion point 15 of sleeve 14 (are located at groove to combine In part 35) holding part 41 keep when, movement of the sleeve 14 relative to the first rotary shaft 12 is restricted, and such as scheming Shown in 17, the soldered tooth 16 of sleeve 14 and the engaged tooth 26 of the second rotary shaft 22 are at a fully engaged.In this case, clutch Mechanism is in engagement state, and the power for inputting the first rotary shaft 12 from driving source is delivered to the second rotary shaft 22.

Revolved in order to which clutch mechanism is changed to release conditions from engagement state with being breaking at the first rotary shaft 12 and second Between rotating shaft 22 power transmission, as shown in Figure 13, shifting part 52 be firstly moved to side axially with To side extruding limiting mechanism 40 (limiting part 42 and 43) axially.If as shown in Figure 14, in compression Limiting part 42 and 43 is moved into the side of axial direction during spring 44 and 45, then the supported portion of its middle sleeve 14 point 15 The condition that the holding part 41 of restricting portion part 42 and 43 is kept is released, and to sleeve 14 relative to the first rotary shaft 12 The limitation of movement be released.

The first rotary shaft 12 when the limitation of the movement to sleeve 14 relative to the first rotary shaft 12 is released wherein It is intended to along the rotating speed of predetermined direction in the situation less than the rotating speed of the second rotary shaft 22, as shown in Fig. 7 to Fig. 5, set The supported portion point 15 of cylinder 14 is moved to right-handed helix groove 32 and recessed then along right-handed helix from groove bound fraction 35 The bearing of trend of groove 32 is moved to groove component 34, thus along with predetermined direction (the rotation side of the first rotary shaft 12 To) identical direction rotated relative to the first rotary shaft 12 when, sleeve 14 is relatively moved into the opposite side of axial direction. Therefore, rotational differential between the first rotary shaft 12 and sleeve 14 is being allowed so as to which the first rotary shaft 12 is along predetermined direction When rotating speed can be less than the rotating speed of sleeve 14 (the second rotary shaft 22), sleeve 14 can be moved into the another of axial direction Side.If sleeve 14 is moved into the opposite side of axial direction, the quilt of the rotary shaft 22 of soldered tooth 16 and second of sleeve 14 The degree reduction that soldered tooth 26 is engaged.

When the supported portion point 15 of sleeve 14 is moved towards groove component 34 in right-handed helix groove 32, direction The load of opposite side axially is applied to sleeve 14 from the spring 38 compressed.Due to the load of spring 38, such as exist Shown in Figure 15, the supported portion point 15 of sleeve 14 is connected to right-handed helix groove 32 on opposite side axially On the 32a of side surface, so that extruding force (reaction force) FR1 is applied to supported portion from the side surface 32a of right-handed helix groove 32 Divide 15, and this extruding force (reaction force) FR1 is applied to the second rotary shaft 22 via spring 38.From right-handed helix groove 32 Side surface 32a be applied to the extruding force FR1 of supported portion points 15 there is direction of rotation (predetermined party along the first rotary shaft 12 To) component F a1, and be applied to sleeve 14 along the moment of torsion of predetermined direction.This moment of torsion along predetermined direction can be used In a part for the power of the first rotary shaft 12 is delivered into the second rotary shaft 22.

On the contrary, first being rotated when the limitation of the movement to sleeve 14 relative to the first rotary shaft 12 is released wherein Rotating speed of the axle 12 along predetermined direction is intended in the situation higher than the rotating speed of the second rotary shaft 22, such as the institute in Fig. 7 to Fig. 6 Show, the supported portion point 15 of sleeve 14 is moved to left hand helix groove 33 and then along left hand spiral shell from groove bound fraction 35 Rotation groove 33 bearing of trend be moved to groove component 34 so that along with the predetermined direction (rotation of the first rotary shaft 12 Turning direction) reverse direction relative to the first rotary shaft 12 when rotating, and sleeve 14 is relatively moved into the another of axial direction Side.Therefore, rotational differential between the first rotary shaft 12 and sleeve 14 is being allowed so as to which the first rotary shaft 12 is along predetermined When the rotating speed in direction can be higher than the rotating speed of sleeve 14 (the second rotary shaft 22), sleeve 14 can be moved into axial direction Opposite side.

When the supported portion point 15 of sleeve 14 is moved towards groove component 34 in left hand helix groove 33, direction The load of opposite side axially is applied to sleeve 14 from the spring 38 compressed.Due to the load of spring 38, such as exist Shown in Figure 16, the supported portion point 15 of sleeve 14 is connected to left hand helix groove 33 on opposite side axially On the 33a of side surface, so that extruding force (reaction force) FL1 is applied to supported portion from the side surface 33a of left hand helix groove 33 Divide 15, and this extruding force (reaction force) FL1 is applied to the second rotary shaft 22 via spring 38.From left hand helix groove 33 Side surface 33a be applied to supported portion points 15 extruding force FL1 have it is (predetermined along the direction of rotation with the first rotary shaft 12 Direction) reverse direction component F b1, and moment of torsion along the direction reverse with predetermined direction is applied to sleeve 14.

If the supported portion of the sleeve 14 moved in right-handed helix groove 32 or left hand helix groove 33 point 15 reach groove component 34, then the load towards opposite side axially is applied to set from the spring 38 compressed Cylinder 14.Therefore, as shown in Fig. 4 to Fig. 3, the supported portion of sleeve 14 point 15 is towards opposite side axially from recessed Groove component 34 is moved to disengaged groove 31, so that as shown in FIG. 2, the soldered tooth 16 of sleeve 14 does not rotate with second The engaged tooth 26 of axle 22 is engaged.In this case, clutch mechanism is in release conditions, and in the He of the first rotary shaft 12 The transmission of power between second rotary shaft 22 is cut off.

According to above-mentioned the present embodiment, in rotating speed of first rotary shaft 12 along predetermined direction turning higher than the second rotary shaft 22 Under conditions of speed, the supported portion point 15 of sleeve 14 is moved to groove knot via right-handed helix groove 32 from groove component 34 Part 35 is closed, so that the bonding operation of clutch mechanism (is used to the soldered tooth 16 of sleeve 14 being moved into axial direction The operation that side is engaged with the engaged tooth 26 with the second rotary shaft 22) it can be carried out.As control, in the first rotary shaft 12 are less than under conditions of the second rotary shaft 22 along the rotating speed of predetermined direction, and the supported portion point 15 of sleeve 14 is via left hand helix Groove 33 is moved to groove bound fraction 35 from groove component 34, so that the bonding operation of clutch mechanism can be held OK.Clutch mechanism release operation (be used for by the soldered tooth 16 of sleeve 14 be moved into the opposite side of axial direction with Depart from the operation engaged with the engaged tooth 26 of the second rotary shaft 22) in, the supported portion point 15 of sleeve 14 is via right hand spiral shell Rotation groove 32 is moved to groove component 34 from groove bound fraction 35, so that in the first rotary shaft 12 along predetermined direction Rotating speed is less than under conditions of the second rotary shaft 22, and clutch mechanism can be released.As control, in releasing for clutch mechanism Put in operation, the supported portion point 15 of sleeve 14 is moved to groove branch via left hand helix groove 33 from groove bound fraction 35 Part 34, so that under conditions of rotating speed of first rotary shaft 12 along predetermined direction is higher than the second rotary shaft 22, clutch machine Structure can be released.Therefore, it is possible to the condition with the first rotary shaft 12 and the rotating speed of the second rotary shaft 22 independently perform from The bonding operation of clutch mechanism and release are operated, and power can connect between the first rotary shaft 12 and the second rotary shaft 22 Connect/disconnect.

And then, when the supported portion point 15 of sleeve 14 is located in groove bound fraction 35 and when the soldered tooth 16 of sleeve 14 With the engaged tooth 26 of the second rotary shaft 22 it is at a fully engaged when, movement of the sleeve 14 relative to the first rotary shaft 12 is restricted machine Structure 40 is limited.It therefore, there is no need to any external impetus to maintain engagement state (the first rotary shaft 12 and second of clutch mechanism The engagement state of rotary shaft 22).Even if when the supported portion points 15 of sleeve 14 is located in disengaged groove 31 and working as sleeve When 14 soldered tooth 16 is not engaged with the engaged tooth 26 of the second rotary shaft 22, it is not necessary to which any external impetus maintains the first rotation The release conditions of the rotary shaft 22 of rotating shaft 12 and second.

When the supported portion point 15 of sleeve 14 is moved in right-handed helix groove 32 or left hand helix groove 33, due to Sleeve 14, the opposite side of direction axially load is applied to from the spring 38 compressed, supported portion point 15 is supported On the side surface 33a for being connected on the side surface 32a of right-handed helix groove 32 or left hand helix groove 33, moment of torsion is applied to sleeve 14.Due to this moment of torsion, during the engagement state of clutch mechanism and the switching of release conditions, a part of power can Transmitted between the first rotary shaft 12 and the second rotary shaft 22, and in the engagement state of clutch mechanism and cutting for release conditions Caused impact can reduce when changing.

In above-mentioned clutch mechanism, by for the load along the direction away from the second rotary shaft 22 to be applied into sleeve It is also possible that 14 spring 38, which is attached to sleeve 14,.The ground of spring 38 is substituted, sets damper to rotate along away from second It is also possible that the load in the direction of axle 22, which is applied to sleeve 14,.

In above-mentioned clutch mechanism, by the engagement of clutch mechanism, the dynamic of the first rotary shaft 12 is inputted from driving source Power is delivered to the second rotary shaft 22.However, by the engagement of clutch mechanism the dynamic of the second rotary shaft 22 will be inputted from driving source It is also possible that power, which is delivered to the first rotary shaft 12,.

Applied to speed changer will be also possible according to the clutch mechanism of the present embodiment.Including according to the present embodiment from The construction example of the speed changer of clutch mechanism is shown in Figure 18 to 20.Figure 18 shows the perspective view of essential structure.Figure 19 is shown The section view for the essential structure seen from the direction intersected with the axial direction at right angle and the first rotary shaft 112.Figure 20 shows Go out the outer surface expanded view that circumferentially direction is deployed of wherein the first rotary shaft 112.It is being used as the of the first rotary part In the periphery of one rotary shaft 112, the first brace groove for supporting the first sleeve 114 as the first movable member is formed 130, and for supporting the second brace groove 230 of the second sleeve 214 as the second movable member.Second brace groove 230 Put than the first brace groove 130 closer to side axially.

Multiple supported portion point (the first supported portion point) 115 are provided with circumferentially in the inner circumferential of the first sleeve 114 Direction is in the space (setting at equal intervals) reserved each other.When each supported portion point 115 is assembled to the first rotation When in the first brace groove 130 of axle 112, the first sleeve 114 is supported by the first rotary shaft 112.First sleeve 114 it is each Individual supported portion points 115 can be moved along the bearing of trend of the first brace groove 130, so that the first sleeve 114 can be along First brace groove 130 is moved relative to the first rotary shaft 112.Moreover, on the periphery of the first sleeve 114, multiple soldered tooths (the first soldered tooth) 116 is provided with circumferentially direction in the space (setting at equal intervals) reserved each other.

Similarly, multiple supported portion point (the second supported portion point) 215 are provided with edge in the inner circumferential of second sleeve 214 Circumferential direction in the space (setting at equal intervals) reserved each other.When each supported portion points 215 is assembled to the When in the second brace groove 230 of one rotary shaft 112, second sleeve 214 is supported by the first rotary shaft 112.First sleeve 114 Each supported portion points 215 can be moved along the bearing of trend of the second brace groove 230 so that the energy of second sleeve 214 It is enough to be moved along the second brace groove 230 relative to the first rotary shaft 112.Moreover, on the periphery of second sleeve 214, it is multiple Soldered tooth (the second soldered tooth) 216 is provided with circumferentially direction in the space (setting at equal intervals) reserved each other.

First gear part 122 is coaxially put with the first rotary shaft 112, and via bearing 123 rotatably Supported by the first rotary shaft 112.The sleeve 114 of first gear part 122 to the first is closer to side axially Put.First gear part 122 has first gear 124 on its outer peripheral portion.Moreover, existing in first gear part 122 On the end face on opposite side axially, multiple engaged teeth (the first engaged tooth) 126 are provided with circumferentially side To in the space reserved each other (with the interval setting at the interval equal to soldered tooth 116).The soldered tooth of first sleeve 114 116 are arranged to axially face the engaged tooth 126 of first gear part 122, and can be with first gear part 122 engaged tooth 126 is engaged (engagement).

Second gear part 222 is also coaxially put with the first rotary shaft 112, and via bearing 223 with rotatable side Formula is supported by the first rotary shaft 112.Axially, the sleeve 114 of second gear part 222 to the first is closer to another Side and than first gear part 122 closer to side put.Second gear part 222 has the on its outer peripheral portion Two gears 224.Moreover, in first gear part 122 on the end face on opposite side axially, multiple engaged teeth (second engaged tooth) 226 be provided with circumferentially direction in the space reserved each other (with those equal to soldered tooth 216 Interval setting).The soldered tooth 216 of second sleeve 214 is arranged to axially being connect in face of second gear part 222 Tooth 226 is closed, and can be engaged (engagement) with the engaged tooth 226 of second gear part 222.

3rd gear 164 and the 4th gear 264 are fixed to the second rotary shaft 162 as the second rotary part, and the Two rotary shafts 162 rotate together with the 3rd gear 164 and the 4th gear 264.3rd gear 164 is engaged with first gear 124, And the 4th gear 264 is engaged with second gear 224.Gear ratio between the gear 164 of first gear 124 and the 3rd is different from Gear ratio between the gear 264 of second gear 224 and the 4th.In example shown in Figure 18 and 19, from the 3rd gear 164 to The gear ratio (number of teeth of the gear of the number of teeth of first gear/the 3rd) of one gear 124 is higher than from the 4th gear 264 to second gear 224 gear ratio (number of teeth of the gear of the number of teeth of second gear/the 4th).

As shown in expanded view in fig. 20, the first brace groove 130 has axially extending first non- Groove 131, groove more disengaged than first 131 are engaged closer to side (side of first gear part 122) axially The the first right-handed helix groove 132 and the first left hand helix groove 133 of positioning, from the first disengaged groove 131 it is branched off into first First groove component 134 of the left hand helix groove 133 of right-handed helix groove 132 and first, and the first groove bound fraction 135, it is axially positioned simultaneously than the first groove component 134 closer to side (side of first gear part 122) And wherein the first right-handed helix groove 132 and the first left hand helix groove 133 are combined.Similarly, the second brace groove 230 has Axially extending the second disengaged groove 231, groove more disengaged than second 231 are closer to axially The the second right-handed helix groove 232 and the second left hand helix groove 233 of opposite side (side of second gear part 222) positioning, from the Two disengaged grooves 231 are branched off into the second groove branch of the second right-handed helix groove 232 and the second left hand helix groove 233 Divide 234, and the second groove bound fraction 235, it is axially than the second groove component 234 closer to opposite side (side of second gear part 222) is positioned and wherein the second right-handed helix groove 232 and the second left hand helix groove 233 are combined. First brace groove 130 (the first disengaged groove 131, the first groove component 134, the first right-handed helix groove 132, One left hand helix groove 133, and the first groove bound fraction 135) and the second brace groove 230 (the second disengaged groove 231, Second groove component 234, the second right-handed helix groove 232, the second left hand helix groove 233, and the second groove joint portion Specific configuration example 235) is divided to be similar to (the disengaged groove of brace groove 30 that the clutch mechanism combined in Fig. 3 to 7 is described 31st, groove component 34, right-handed helix groove 32, left hand helix groove 33, and groove bound fraction 35).

First gear part 122 is attached to as the first spring 138 of the first load generation mechanism.The edge of first spring 138 It is elastic axial direction, also, by along the load in the direction away from first gear part 122, (direction is axially square To opposite side load) be applied to the first sleeve 114.Is attached to as the second spring 238 of the second load generation mechanism Two geared parts 222.Second spring 238 is axially elastic, and by along away from second gear part 222 The load (towards the load of side axially) in direction is applied to second sleeve 214.

When the supported portion point 115 of the first sleeve 114 is assemblied in the first groove bound fraction 135, the first limitation machine Limitation 115 the moving along the first brace groove 130 of supported portion point of structure 140, thus limit the first sleeve 114 relative to first The movement of rotary shaft 112.When the supported portion point 215 of second sleeve 214 is assemblied in the second groove bound fraction 235, the Two limiting mechanisms 240 limitation 215 moving along the second brace groove 230 of supported portion point, thus limit the phase of second sleeve 214 For the movement of the first rotary shaft 112.The specific configuration example of first and second limiting mechanisms 140 and 240 is similar to and combines Fig. 8 To the specific configuration of the limiting mechanism 40 (limiting part 42 and 43 and spring 44 and 45) of the clutch mechanism description in 11 and 14 Example.

Drive mechanism 152 can be disengaged recessed from first by the Support Position of first 130 pair of first sleeve 114 of brace groove Groove 131 is moved to the first groove component 134.Drive mechanism 152 can also be by the second brace groove 230 to second sleeve 214 Support Position is moved to the second groove component 234 from the second disengaged groove 231.In example shown in Figure 18 and 19 In, in the inner circumferential that the first rotary shaft 112 is arranged on as the shifting part 152 of drive mechanism, and shifting part 152 being capable of edge Axial direction to move relative to the first rotary shaft 112.Moreover, the first rotary shaft 112 is provided with the first and second linkages 154 and 254, and the first and second linkages 154 and 254 can surround the axis perpendicular to axial direction relative to first Rotary shaft 112 rotates.As shown in Figure 21, if shifting part 152 is moved into the opposite side of axial direction, first Linkage 154 is rotated counterclockwise to extrude the first sleeve 114 towards side axially, so that first in figure 21 Sleeve 114 is moved into the side of axial direction, and the supported portion of the first sleeve 114 while compression spring 138 115 are divided to be moved to the first groove component 134 from the first disengaged groove 131.On the other hand, as shown in Figure 22, If shifting part 152 is moved into the side of axial direction, second connecting rod mechanism 254 rotate clockwise in fig. 22 with Towards opposite side extruding second sleeve 214 axially, so that second sleeve 214 is in the same of compression second spring 238 When be moved to opposite side axially, and second sleeve 214 supported portion point 215 from the second disengaged groove 231 are moved to the second groove component 234.

Shifting part 152 can discharge the first limiting mechanism 140 for the first sleeve 114 relative to the first rotary shaft 112 Movement limitation.Shifting part 152 can also discharge the second limiting mechanism 240 for second sleeve 214 relative to the first rotation The limitation of the movement of rotating shaft 112.In construction example shown in Figure 18 and 19, if shifting part 152 is moved as shown in Figure 23 Side axially is moved to extrude the first limiting mechanism 140 to side axially, then the first limitation machine Structure 140 is moved into the side of axial direction so as to the limitation as described in the clutch mechanism in reference to Fig. 8 to 11 and 14 In mechanism 40 like that, limitation of first sleeve 114 relative to the movement of the first rotary shaft 112 is released.If shifting part 152 are moved into the opposite side of axial direction to extrude the second limiting mechanism 240 to opposite side axially, then and the Two limiting mechanisms 240 are moved into the opposite side of axial direction so as to as in the clutch mechanism with reference to shown in Fig. 8 to 11 and 14 In the limiting mechanism 40 of description like that, limitation of the second sleeve 214 relative to the movement of the first rotary shaft 112 is released.Separately Outside, additionally it is possible to by driving actuator under electronic control or driving the drive mechanism 152 (to move by the operation of operator Position part 152 can also be moved axially).

Then, description is according to the operation of the speed changer of the present embodiment, especially, wherein the change gear ratio quilt of speed changer Operation in the situation of change.In situation described below, the power from driving source such as engine or motor is defeated Enter the second rotary shaft 162, and input the power of the second rotary shaft 162 by gear shift and then by defeated from the first rotary shaft 112 Go out.

As shown in Figure 20, when the supported portion point 115 of the first sleeve 114 is assemblied in the first disengaged groove 131 When and when the supported portion points 215 of second sleeve 214 is assemblied in the second disengaged groove 231, as shown in Figure 19, the The soldered tooth 116 of one sleeve 114 do not engage with the engaged tooth 126 of first gear part 122, and second sleeve 214 connects Tooth 216 is closed not engage with the engaged tooth 226 of second gear part 222.In this case, speed changer is in neutral state, And the power transmission between the second rotary shaft 162 and the first rotary shaft 112 is cut off.If the second rotary shaft 162 is utilized Dynamic rotation from driving source, then (it is in figure along predetermined direction for first gear part 122 and second gear part 222 Side clockwise in example in 19 when seeing the first rotary shaft 112 from side (left side in Figure 19) axially To) rotation.Because the gear ratio (number of teeth of the gear of the number of teeth of first gear/the 3rd) from the 3rd gear 164 to first gear 124 Higher than the gear ratio (number of teeth of the gear of the number of teeth of second gear/the 4th) from the 4th gear 264 to second gear 224, so Rotating speed of one geared parts 122 along predetermined direction is less than second gear part 222.The first rotary shaft is delivered to without any power 112, and the rotation of the first rotary shaft 112 stopped.

In order to be selected as speed changer gear shift level first gear level (low-grade level), as shown in Figure 21, displaced portions Part 152 is firstly moved to opposite side axially to utilize first connecting rod mechanism 154 to side axially Extrude the first sleeve 114.When compressing the first spring 138, the first sleeve 114 is moved into the side of axial direction, and If the supported portion of the first sleeve 114 point 115 is moved to the first groove component 134 from the first disengaged groove 131, The soldered tooth 116 of first sleeve 114 starts to engage with the engaged tooth 126 of first gear part 122, and the first sleeve 114 Rotate and synchronize with first gear part 122, as shown in Figure 21.

When the supported portion point 115 of the first sleeve 114 is moved into the first groove component 134, supported portion 115 are divided to be moved to the first left hand helix groove 133 and recessed then along the first left hand helix from the first groove component 134 The bearing of trend of groove 133 is moved to the first groove bound fraction 135, so that as shown in Figure 24, because first gear part 122 along predetermined direction rotating speed be higher than the first rotary shaft 112, so along predetermined direction relative to the first rotary shaft 112 During rotation, the first sleeve 114 is relatively moved into the side of axial direction.Therefore, allowing in the first sleeve 114 and the Rotational differential between one rotary shaft 112 is so that the first sleeve 114 (first gear part 122) can along the rotating speed of predetermined direction During with higher than the first rotary shaft 112, the first sleeve 114 can be moved into the side of axial direction.If the first sleeve 114 The side of axial direction is moved into, then the engaged tooth of the soldered tooth 116 of the first sleeve 114 and first gear part 122 The degree increase of 126 engagements.

When the first groove bound fraction 135 of direction of supported portion point 115 of the first sleeve 114 is in the first left hand helix groove When being moved in 133, when extruding the first spring 138, the first sleeve 114 is moved into the side of axial direction, and direction The load of opposite side axially is applied to the first sleeve 114 from the first spring 138.Due to the load of the first spring 138 Lotus, as shown in Figure 25, it is another axially that supported portion points 115 is connected to the first left hand helix groove 133 On side surface (the first abutment surface) 133a on side.Because the side surface 133a of the first left hand helix groove 133 is before it Side is to direction of rotation (predetermined direction) of its rear side relative to the first rotary shaft 112 towards another inclination axially Tiltedly, so there is edge from the 115 side surface 133a for being applied to the first left hand helix groove 133 of supported portion point extruding force FL2 The component F b2 of the direction of rotation (predetermined direction) of the first rotary shaft 112.Therefore, by from being attached to first gear part 122 The first spring 138 load towards opposite side axially is applied to the first sleeve 114, along predetermined direction Moment of torsion is applied to the first rotary shaft 112.This moment of torsion along predetermined direction can be used in rotate from driving source input second One of the power of axle 162 is partially transferred to first gear part 122.

If the supported portion of the first sleeve 114 point 115 is moved into the first groove bound fraction 135, such as in figure Shown in 26, the soldered tooth 116 of the first sleeve 114 and the engaged tooth 126 of first gear part 122 are at a fully engaged.Moreover, by Movement of the support section 115 along the first brace groove 130 is limited by the first limiting mechanism 140, so that the phase of the first sleeve 114 Movement for the first rotary shaft 112 is restricted.As a result, first gear level is selected, and inputs second from driving source The power of rotary shaft 162 with the gear ratio gear shift from the 3rd gear 164 to first gear 124 and is then passed to the first rotation Rotating shaft 112.In first gear level, first gear part 122, the first sleeve 114 and the first rotary shaft 112 are along predetermined direction Integratedly rotate, and the speed of this rotation is less than second gear part 222.

In order to perform upshift to be switched to the second gear as the gear shift level of speed changer from first gear level (low-grade level) Level (high-grade level), as shown in Figure 22, shifting part 152 are firstly moved to side axially using second to connect Linkage 254 extrudes second sleeve 214 and to side extruding the axially to opposite side axially One limiting mechanism 140.When compressing second spring 238, second sleeve 214 is moved into the opposite side of axial direction, and If the supported portion of second sleeve 214 point 215 is moved to the second groove component 234 from the second disengaged groove 231, The soldered tooth 216 of second sleeve 214 starts to engage with the engaged tooth 226 of second gear part 222, and second sleeve 214 Rotate and synchronize with second gear part 222, as shown in Figure 22.

When the supported portion point 215 of second sleeve 214 is moved into the second groove component 234, supported portion Divide 215 to be moved to the second right-handed helix groove 232 and the bearing of trend then along the second right-handed helix groove 232 is moved to Second groove bound fraction 235, so that as shown in Figure 27, because rotating speed of the second gear part 222 along predetermined direction Higher than the first rotary shaft 112, so when being rotated along predetermined direction relative to the first rotary shaft 112, second sleeve 214 is relative Ground is moved along the opposite side of axial direction.Therefore, the rotation between the rotary shaft 112 of second sleeve 214 and first is being allowed Difference can be higher than the first rotary shaft 112 so as to rotating speed of the second sleeve 214 (second gear part 222) along predetermined direction When, second sleeve 214 can be moved into the opposite side of axial direction.If second sleeve 214 is moved into axial side To opposite side, then the soldered tooth 216 of second sleeve 214 is engaged with the engaged tooth 226 of second gear part 222 degree increases Plus.

When the second groove bound fraction 235 of direction of supported portion point 215 of second sleeve 214 is in the second right-handed helix groove When being moved in 232, as shown in Figure 23, shifting part 152 further moves to side axially with further The first limiting mechanism 140 is extruded to side axially.Then the first limiting mechanism 140 is moved into axial direction Side be released so as to the limitation of movement to the first sleeve 114 relative to the first rotary shaft 112.

When the second groove bound fraction 235 of direction of supported portion point 215 of second sleeve 214 is in the second right-handed helix groove When being moved in 232, when extruding second spring 238, second sleeve 214 is moved into the opposite side of axial direction, and by In the load of second spring 238, as shown in Figure 28, supported portion point 215 is connected to the second right-handed helix groove 232 on edge On side surface (the second abutment surface) 232a on the side of axial direction.Because the side table of the second right-handed helix groove 232 Face 232a is from its front side to direction of rotation (predetermined direction) of its rear side relative to the first rotary shaft 112 towards axially The side in direction is tilted, so being applied to the side surface 232a of the second right-handed helix groove 232 extruding from supported portion point 215 Power FR2 has the component F a2 along the direction of rotation (predetermined direction) of the first rotary shaft 112.Therefore, by from being attached to second Load towards side axially is applied to second sleeve 214 by the second spring 238 of geared parts 222, along The moment of torsion of predetermined direction is applied to the first rotary shaft 112.This moment of torsion along predetermined direction can be used in will be defeated from driving source Enter the power of the second rotary shaft 162 one is partially transferred to the first rotary shaft 112, even if to the first sleeve 114 relative to The limitation of the movement of one rotary shaft 112 is released.

If the supported portion of second sleeve 214 point 215 is moved into the second groove bound fraction 235, such as in figure Shown in 29, the soldered tooth 216 of second sleeve 214 is engaged with the engaged tooth 226 of second gear part 222 completely.Moreover, by Movement of the support section 215 along the second brace groove 230 is limited by the second limiting mechanism 240, so that the phase of second sleeve 214 Movement for the first rotary shaft 112 is restricted.Because rotating speed of first rotary shaft 112 along predetermined direction is intended to be higher than First gear part 122, so the supported portion of the first sleeve 114 point 115 is moved to first from the first groove bound fraction 135 Left hand helix groove 133 and bearing of trend then along the first left hand helix groove 133 is moved to the first groove branch Points 134, so that as shown in Figure 30, along the direction reverse with predetermined direction (direction of rotation of the first rotary shaft 112) When being rotated relative to the first rotary shaft 112, the first sleeve 114 is relatively moved into the opposite side of axial direction.Therefore, exist When allowing the rotational differential between the first rotary shaft 112 and the first sleeve 114, the first sleeve 114 can be moved into axle To the opposite side in direction.When the first groove component 134 of direction of supported portion point 115 of the first sleeve 114 is in the first left hand When being moved in helical groove 133, it is applied to towards the load of opposite side axially from the first spring 138 compressed First sleeve 114, so that supported portion point 115 is connected on the side surface 133a of the first left hand helix groove 133.If first The supported portion of sleeve 114 point 115 reaches the first groove component 134, then towards the load of opposite side axially Lotus is applied to the first sleeve 114 from the spring 138 compressed.Therefore, supported portion points 115 is another towards axially Side is moved to the first disengaged groove 131 from the first groove component 134, thus the soldered tooth 116 of the first sleeve 114 not with The engaged tooth 126 of first gear part 122 is engaged.Due to aforesaid operations, from first gear level to the upshift of second gear level It is carried out, the power of the second rotary shaft 162 is inputted by with the number of teeth from the 4th gear 264 to second gear 224 from driving source Than gear shift and it is then passed to the first rotary shaft 112.In second gear level, second gear part 222, second sleeve 214, Integratedly rotated along predetermined direction with the first rotary shaft 112, and the speed of this rotation is higher than first gear part 122.

In order to perform downshift to be switched to the first gear level as the gear shift level of speed changer, displaced portions from second gear level Part 152 is firstly moved to opposite side axially to utilize first connecting rod mechanism 154 to side axially Extrude the first sleeve 114 and extrude the second limiting mechanism 240 to opposite side axially.Compressing the first spring When 138, the first sleeve 114 is moved into the side of axial direction, and if the supported portion point 115 of the first sleeve 114 The first groove component 134 is moved to from the first disengaged groove 131, then the soldered tooth 116 of the first sleeve 114 starts and the The engaged tooth 126 of one geared parts 122 is engaged, and the first sleeve 114 and first gear part 122 rotate and synchronously Change.

When the supported portion point 115 of the first sleeve 114 is moved into the first groove component 134, supported portion 115 are divided to be moved to the first right-handed helix groove 132 and recessed then along the first right-handed helix from the first groove component 134 The bearing of trend of groove 132 is moved to the first groove bound fraction 135, so that because first gear part 122 is along predetermined direction Rotating speed be less than the first rotary shaft 112, so as shown in Figure 31, along the direction reverse with predetermined direction relative to the When one rotary shaft 112 rotates, the first sleeve 114 is relatively moved into the side of axial direction.Therefore, allowing first Rotational differential between the rotary shaft 112 of sleeve 114 and first is so as to which the first sleeve 114 (first gear part 122) is along predetermined When the rotating speed in direction can be less than the first rotary shaft 112, the first sleeve 114 can be moved into the side of axial direction.

When the first groove bound fraction 135 of direction of supported portion point 115 of the first sleeve 114 is in the first right-handed helix groove When being moved in 132, shifting part 152 further moves to opposite side axially with further to axially Opposite side extrude the second limiting mechanism 240.Then the second limiting mechanism 240 be moved into the opposite side of axial direction so as to The limitation of movement to second sleeve 214 relative to the first rotary shaft 112 is released.

When the first groove bound fraction 135 of direction of supported portion point 115 of the first sleeve 114 is in the first right-handed helix groove When being moved in 132, when extruding the first spring 138, the first sleeve 114 is moved into the side of axial direction, and towards edge The load for the opposite side of axial direction is applied to the first sleeve 114 from the first spring 138.Due to the load of the first spring 138, As shown in Figure 32, supported portion point 115 is connected to the first right-handed helix groove 132 on opposite side axially Side surface (the first abutment surface) 132a on.Because the side surface 132a of the first right-handed helix groove 132 from its front side to Its rear side is tilted relative to the direction of rotation (predetermined direction) of the first rotary shaft 112 towards side axially, institute Have with the extruding force FR3 for the side surface 132a that the first right-handed helix groove 132 is applied to from supported portion points 115 along with the The component F a3 in the reverse direction in the direction of rotation (predetermined direction) of one rotary shaft 112, and along the side reverse with predetermined direction To moment of torsion be applied to the first rotary shaft 112.

If the supported portion of the first sleeve 114 point 115 is moved into the first groove bound fraction 135, first set The soldered tooth 116 of cylinder 114 is engaged with the engaged tooth 126 of first gear part 122 completely.Moreover, supported portion points 115 along The movement of first brace groove 130 is limited by the first limiting mechanism 140, so that the first sleeve 114 is relative to the first rotary shaft 112 movement is restricted.Because rotating speed of first rotary shaft 112 along predetermined direction is intended to be less than second gear part 222, so the supported portion of second sleeve 214 point 215 is moved to the second left hand helix groove from the second groove bound fraction 235 233 and the bearing of trend then along the second left hand helix groove 233 is moved to the second groove component 234, so that When being rotated along predetermined direction relative to the first rotary shaft 112, second sleeve 214 is relatively moved into the one of axial direction Side.Therefore, when allowing the rotational differential between the first rotary shaft 112 and second sleeve 214, second sleeve 214 can be moved Move side axially.When the supported portion point 215 of second sleeve 214 exists towards the second groove component 234 When being moved in the second left hand helix groove 233, towards the load of side axially from the second spring 238 compressed Second sleeve 214 is applied to, so that supported portion points 215 is connected to the second left hand helix groove 233 axially On side surface (the second abutment surface) on side.If the supported portion of second sleeve 214 point 215 reaches the second groove branch Part 234, then the load towards side axially be applied to second sleeve 214 from the second spring 238 compressed. Therefore, to be moved to second towards side axially from the second groove component 234 disengaged for supported portion points 215 Groove 231, so that the soldered tooth 216 of second sleeve 214 is not engaged with the engaged tooth 226 of second gear part 222.Due to upper Operation is stated, the downshift from second gear level to first gear level is carried out.

, can be unrelated with the condition of the first rotary shaft 112 and the rotating speed of first gear part 122 according to above-mentioned the present embodiment Ground performs the bonding operation of the first rotary shaft 112 and first gear part 122 and release is operated, and first gear level can be by Selection and cancellation selection.Analogously it is possible to the first rotary shaft 112 and the condition of the rotating speed of second gear part 222 independently Perform the first rotary shaft 112 and the bonding operation of second gear part 222 and release is operated, and second gear level can be chosen Select and cancel selection.Therefore, it is unrelated with the condition of the rotating speed of the first and second geared parts 122 and 222 with the first rotary shaft 112 Ground, selects first gear level from neutral state and performs from first gear level to the upshift of second gear level and from second gear The downshift of level to first gear level is possible.Moreover, when selecting first gear level, the first sleeve 114 is relative to the first rotation The movement of rotating shaft 112 is limited by the first limiting mechanism 140, and the first rotary shaft is maintained without any external impetus 112 and the engagement state of first gear part 122.When selecting second gear level, second sleeve 214 is relative to the first rotary shaft 112 movement is limited by the second limiting mechanism 240, and the He of the first rotary shaft 112 is maintained without any external impetus The engagement state of second gear part 222.Equally in neutral state, it is not necessary to which any external impetus maintains the first rotary shaft 112 and first and second geared parts 122 and 222 release conditions.

When the supported portion point 115 of the first sleeve 114 is in the first right-handed helix groove 132 or the first left hand helix groove When being moved in 133, because the load towards opposite side axially from the first spring 138 is applied to the first sleeve 114, Supported portion point 115 is connected to the side surface 132a of the first right-handed helix groove 132 or the side of the first left hand helix groove 133 On the 133a of surface, so that moment of torsion is applied to the first rotary shaft 112.The same supported portion for working as second sleeve 214 point 215 is second When being moved in the left hand helix groove 233 of right-handed helix groove 232 or second, due to the load towards side axially Lotus is applied to second sleeve 214 from second spring 238, and supported portion point 215 is connected to the side table of the second right-handed helix groove 232 On the side surface of face 232a or the second left hand helix groove 233, so that moment of torsion is applied to the first rotary shaft 112.Due to this Moment of torsion, respectively, during from neutral state selection first gear level, from first gear level upshift to the second gear level phase Between, and during from second gear level downshift to first gear level, passed between the first rotary shaft 112 and the second rotary shaft 162 One part of graduating power and reduce the shifting shock for being occur when switching between first gear level and second gear level and be It is possible.

In above-mentioned speed changer, for the load along the direction away from first gear part 122 to be applied into first set First spring 138 of cylinder 114 can be attached to the first sleeve 114, and for by along the side away from second gear part 222 To load be applied to the second spring 238 of second sleeve 214 and can be attached to second sleeve 214.Substitute the ground of the first spring 138 It is also possible so that the load along the direction away from first gear part 122 is applied into the first sleeve 114 to set damper. The ground of second spring 238 is substituted to set damper the load along the direction away from second gear part 222 is applied into second Sleeve 214 is also possible.

By gear shift and then in above-mentioned speed changer, the power of the second rotary shaft 162 is inputted by from first from driving source Rotary shaft 112 is exported.By gear shift and then however, the power for inputting the first rotary shaft 112 from driving source can also be by from the Two rotary shafts 162 are exported.

In above-mentioned speed changer, gear stage is switched to two-stage (first gear level and second gear level).However, speed changer Gear stage can also be switched to three-level or more stages.

Although being described for implementing the pattern of the present invention, the present invention is not limited to this embodiment.Should Understand, in the case of the spirit without departing from the present invention, the present invention can be implemented in a variety of manners.

Reference numerals list

12,112：First rotary shaft,

14：Sleeve,

15,115,215：Supported portion point,

16,116,216：Soldered tooth,

22,162：Second rotary shaft,

23,123,233：Bearing,

26,126,226：Engaged tooth,

30：Brace groove,

31：Disengaged groove,

32：Right-handed helix groove,

33：Left hand helix groove,

34：Groove component,

35：Groove bound fraction,

38,44,45：Spring,

40：Limiting mechanism,

41：Holding part,

42,43：Limiting part,

46,47：Tapered surface,

52,152：Drive mechanism (shifting part),

54：Linkage,

114：First sleeve,

122：First gear part,

124：First gear,

130：First brace groove,

131：First disengaged groove,

132：First right-handed helix groove,

133：First left hand helix groove,

134：First groove component,

135：First groove bound fraction,

138：First spring,

140：First limiting mechanism,

154：First connecting rod mechanism,

164：3rd gear,

214：Second sleeve,

222：Second gear part,

224：Second gear,

230：Second brace groove,

231：Second disengaged groove,

232：Second right-handed helix groove,

233：Second left hand helix groove,

234：Second groove component,

235：Second groove bound fraction,

238：Second spring,

240：Second limiting mechanism,

254：Second connecting rod mechanism,

264：4th gear.

Claims

1. a kind of clutch mechanism, including：

First rotary part；

Movable member, the movable member is provided with bonding part；With

Second rotary part, second rotary part is provided with engaged part, and the engaged part is configured to and institute The bonding part engagement of movable member is stated,

Wherein, first rotary part is provided with the support section for supporting the movable member, and the movable member energy It is enough to be moved relative to first rotary part along the support section,

The support section includes：

Non-engaging portion, the non-engaging portion the bonding part of the movable member not with second rotary part The position closed of joint tap at the support movable member,

Left-hand screw portion and right-handed helix part, the left-hand screw portion and the right-handed helix part with it is described disengaged Part is compared and is positioned to closer to the second rotary part side,

Component, the component is branched off into the left-hand screw portion and the right-handed helix from the non-engaging portion Part, and

Bound fraction, the bound fraction is positioned to compared with the component closer to the second rotary part side, also, In the bound fraction, the left-hand screw portion and the right-handed helix part are combined, and

When the Support Position that the movable member is supported by the support section be moved to from the non-engaging portion it is described During component, start the bonding part of the movable member and the joint of second rotary part and divide it Between engagement,

The clutch mechanism further comprises limiting mechanism, the support level supported when the movable member by the support section Put when being bound fraction, the limiting mechanism limits movement of the movable member relative to first rotary part.

2. clutch mechanism according to claim 1, further comprises：

Load generation mechanism, the load generation mechanism is applied to the side for leaving second rotary part to the movable member Upward load.

3. clutch mechanism according to claim 2, wherein：

The movable member is provided with supported portion point, and the supported portion point is supported by the support section, and

When the load is applied to the movable member by the load generation mechanism, the supported portion point is connected to abutting On surface, the abutment surface is formed at least one spiral in the left-hand screw portion and the right-handed helix part In part.

4. a kind of speed changer, including：

First rotary part；

First movable member, first movable member is provided with the first bonding part；

First gear part, the first gear part includes first gear, and the first gear part is provided with first Engaged part, the described first engaged part is configured to first junction surface tap with first movable member Close；

Second movable member, second movable member is provided with the second bonding part；

Second gear part, the second gear part includes second gear, and the second gear part is provided with second Engaged part, the described second engaged part is configured to second junction surface tap with second movable member Close；With

Second rotary part, second rotary part rotates together with the 3rd gear and the 4th gear, wherein the 3rd tooth Wheel is engaged with the first gear, and the 4th gear is engaged with the second gear,

Wherein, the gear ratio between the first gear and the 3rd gear is different from the second gear and the 4th tooth Gear ratio between wheel,

First rotary part is provided with the first support section for supporting first movable member and support described second can Second support section of dynamic component, first movable member can be relative to first rotary part along described first Support part point movement, second movable member can be moved relative to first rotary part along second support section It is dynamic,

First support section includes：

First non-engaging portion, first non-engaging portion first bonding part of first movable member not with Support first movable member at the position that first joint tap of the first gear part is closed,

First left-hand screw portion and the first right-handed helix part, first left-hand screw portion and first right-handed helix Part is positioned to compared with first non-engaging portion closer to first gear component side,

First component, first component is branched off into the first left hand helix portion from first non-engaging portion Divide and the first right-handed helix part, and

First bound fraction, first bound fraction is positioned to closer to first gear compared with first component Component side, also, in first bound fraction, first left-hand screw portion and the first right-handed helix part knot Close,

The Support Position supported by first support section when first movable member is from the described first disengaged portion When point being moved to first component, start first bonding part of first movable member and first tooth Engagement between first joint of wheel component point,

Second support section includes：

Second non-engaging portion, second non-engaging portion second bonding part of second movable member not with Support second movable member at the position that second joint tap of the second gear part is closed,

Second left-hand screw portion and the second right-handed helix part, second left-hand screw portion and second right-handed helix Part is positioned to compared with second non-engaging portion closer to second gear component side,

Second component, second component is branched off into the second left hand helix portion from second non-engaging portion Divide and the second right-handed helix part, and

Second bound fraction, second bound fraction is positioned to closer to second gear compared with second component Component side, also, in second bound fraction, second left-hand screw portion and the second right-handed helix part knot Close, and

The Support Position supported by second support section when second movable member is from the described second disengaged portion When point being moved to second component, start second bonding part of second movable member and second tooth Engagement between second joint of wheel component point,

The speed changer further comprises：

First limiting mechanism, when the Support Position that first movable member is supported by first support section is the first combination During part, first limiting mechanism limits movement of first movable member relative to first rotary part, and

Second limiting mechanism, when the Support Position that second movable member is supported by second support section is the second combination During part, second limiting mechanism limits movement of second movable member relative to first rotary part.

5. speed changer according to claim 4, further comprises：

First load generation mechanism, the first load generation mechanism is applied to first movable member and leaves described first Load on the direction of geared parts, and

Second load generation mechanism, the second load generation mechanism is applied to second movable member and leaves described second Load on the direction of geared parts.

6. speed changer according to claim 5, wherein：

First movable member is provided with the first supported portion point supported by first support section,

Second movable member is provided with the second supported portion point supported by second support section,

When load is applied to first movable member by the first load generation mechanism, first supported portion point is supported It is connected in the first abutment surface, first abutment surface is formed on first left-hand screw portion and first right hand In at least one spiral part in spiral part, and

When load is applied to second movable member by the second load generation mechanism, second supported portion point is supported It is connected in the second abutment surface, second abutment surface is formed on second left-hand screw portion and second right hand In at least one spiral part in spiral part.